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Code 232419: <location>Encoder 2: Track A or B outside the tolerance range

Issue Description & Safety Warning

The Siemens SINUMERIK 840D CNC has triggered a critical <location>Encoder 2: Track A or B outside the tolerance range alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.

Official Troubleshooting Steps

Message value: %1 Drive object: All objects Reaction: NONE Acknowledge: NONE Cause: The amplitude, phase or offset correcti on for track A or B is at the limit. Amplitude error correction: Amplitude B / Amplitude A = 0.78... 1.27 Phase: <84 degrees or >96 degrees SMC20: Offset correction: +/-140 mV SMC10: Offset correction: +/-650 mV SINAMICS-Alarms Diagnostics Manual (DAsl), 03/2009 Alarm value (r2124, interpret hexadecimal): xxxx1: Minimum of the offset correction, track B xxxx2: Maximum of the offset correction, track B xxx1x: Minimum of the offset correction, track A xxx2x: Maximum of the offset correction, track A xx1xx: Minimum of the amplitude correction, track B/A xx2xx: Maximum of the amplitude correction, track B/A x1xxx: Minimum of the phase error correction x2xxx: Maximum of the phase error correction 1xxxx: Minimum of the cubic correction 2xxxx: Maximum of the cubic correction Remedy: - check mechanical mounting tolerances for encoder s without their own bearings (e.g. toothed-wheel encoders). - check the plug connections (als o the transition resistance). - check the encoder signals. - replace the encoder or encoder cable.

Source: SINUMERIK 840D sl / 840Di sl / SINAMICS S120 Diagnostics Manual (DAsl, 03/2009)

Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.

About Siemens SINUMERIK 840D CNC Alarms

Siemens controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code 232419 on the SINUMERIK 840D CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Siemens's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.

Complete Alarm List: 4014 Siemens SINUMERIK 840D CNC codes.

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